01 -
Stir together the flour, baking soda, salt, and baking powder.
02 -
Whisk sour cream, cheese, eggs, onions, zucchini, and butter in a bowl.
03 -
Gently fold the dry mixture into the wet, then pour into a buttered 9x5 pan.
04 -
Pop into a 350°F oven and let it bake for 50-70 minutes. Check for doneness.